EP 1553196 A4 20060830 - FERRONICKEL AND PROCESS FOR PRODUCING RAW MATERIAL FOR FERRONICKEL SMELTING
Title (en)
FERRONICKEL AND PROCESS FOR PRODUCING RAW MATERIAL FOR FERRONICKEL SMELTING
Title (de)
FERRONICKEL UND VERFAHREN ZUR HERSTELLUNG VON ROHMATERIAL FÜR DIE FERRONICKELVERHÜTTUNG
Title (fr)
FERRONICKEL ET PROCEDE DE PRODUCTION D'UN MATERIAU BRUT DESTINE A LA FUSION DE FERRONICKEL
Publication
Application
Priority
- JP 0311960 W 20030919
- JP 2002304575 A 20021018
Abstract (en)
[origin: US2005211020A1] The present invention provides a process that is useful in producing ferronickel having a high Ni content at low cost with high efficiency and reproducibility even if a low-grade feedstock containing nickel oxide is used. In particular, a feedstock containing nickel oxide and iron oxide is mixed with a carbonaceous reductant, the mixture is formed into agglomerates with an agglomerator, and the agglomerates are heated and reduced in a moving hearth furnace, whereby reduced agglomerates in which the Ni metallization degree is 40% or more and the Fe metallization degree is at least 15% less than the Ni metallization degree are prepared by adjusting the retention time of the agglomerates placed in the moving hearth furnace. The reduced agglomerates, in which the Ni component has been primarily reduced as compared with the Fe component, are smelted in a smelting furnace, whereby ferronickel having a high Ni content is obtained.
IPC 8 full level
C22C 33/04 (2006.01); C21B 13/00 (2006.01); C21B 13/10 (2006.01); C21B 13/14 (2006.01); C21C 5/52 (2006.01)
CPC (source: EP US)
C21B 13/0046 (2013.01 - EP US); C21B 13/006 (2013.01 - EP US); C21B 13/105 (2013.01 - EP US); C21B 13/143 (2013.01 - EP US); C21C 5/5264 (2013.01 - EP US); Y02P 10/20 (2015.11 - EP US)
Citation (search report)
- [X] US 5567224 A 19961022 - KUNDRAT DAVID M [US]
- [X] BAROZZI S: "METAL RECOVERY FROM STEEL WASTES BY THE INMETCO PROCESS", STEEL TIMES, FUEL & METALLURGICAL JOURNALS LTD. LONDON, GB, vol. 225, no. 5, May 1997 (1997-05-01), pages 191 - 192, XP000692297, ISSN: 0039-095X
- [A] BANERJEE G N ET AL: "STUDIES ON REDUCTION ROASTING OF CHROMITE OVERBURDEN IN A MULTIPLE HEARTH FURNACE FOR EXTRACTION OF NICKEL AND COBALT", TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS, INDIAN INSTITUTE OF METALS, CALCUTTA, IN, vol. 54, no. 5, October 2001 (2001-10-01), pages 193 - 198, XP009015045, ISSN: 0019-493X
- [A] PARGETER J K ET AL: "operating experience at inmetco and application of the process to the production of dri", CONSERVATION AND RECYCLING, PERGAMON PRESS. OXFORD, GB, vol. 8, no. 3/4, 1985, pages 363 - 375, XP002254917
- See references of WO 2004035847A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
US 2005211020 A1 20050929; AT E403015 T1 20080815; AU 2003264505 A1 20040504; BR 0306607 A 20041130; DE 60322561 D1 20080911; EP 1553196 A1 20050713; EP 1553196 A4 20060830; EP 1553196 B1 20080730; EP 1867736 A1 20071219; RU 2005115085 A 20051027; RU 2313595 C2 20071227; US 2007113708 A1 20070524; WO 2004035847 A1 20040429
DOCDB simple family (application)
US 50854604 A 20040928; AT 03808887 T 20030919; AU 2003264505 A 20030919; BR 0306607 A 20030919; DE 60322561 T 20030919; EP 03808887 A 20030919; EP 07014615 A 20030919; JP 0311960 W 20030919; RU 2005115085 A 20030919; US 62716507 A 20070125